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[Partial lecithin-cholesterol acyltransferase (LCAT) deficiency syndrome]
F D Brites1, K M Fernández, M J Zunino
1Departamento de Bioquímica Clínica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina. fbrites@dbc.ffyb.uba.ar
Medicina
|June 1, 1999
Summary
This study reports a rare case of familial lecithin-cholesterol acyltransferase (LCAT) deficiency, a condition impacting high-density lipoprotein (HDL) metabolism. The patient presented with unique symptoms including cardiac events and hypertension, expanding the known clinical spectrum of this disorder.
Area of Science:
- Biochemistry
- Lipid Metabolism
- Genetics
Background:
- Familial lecithin-cholesterol acyltransferase (LCAT) deficiency is a rare genetic disorder.
- It primarily affects high-density lipoprotein (HDL) metabolism, leading to abnormal lipid profiles.
- Understanding LCAT deficiency is crucial for managing associated cardiovascular risks.
Observation:
- A 63-year-old woman presented with bilateral corneal opacity and eruptive xanthomas.
- Lipoprotein analysis revealed severe hypertriglyceridemia and normocholesterolemia with low cholesteryl esters.
- Markedly decreased HDL-cholesterol and apolipoproteins A-I and A-II were observed.
Findings:
- The patient exhibited glucose intolerance and hematological changes due to altered erythrocyte membrane lipid composition.
- LCAT activity was significantly reduced by 82% compared to controls.
- Cardiac events and hypertension, uncommon in partial LCAT deficiency, were noted in this patient.
Implications:
- This case expands the clinical presentation of LCAT deficiency, particularly partial forms.
- The presence of cardiac events and hypertension warrants further investigation into LCAT's role in cardiovascular health.
- Highlights the importance of comprehensive lipid profiling and genetic evaluation in patients with unexplained metabolic and dermatological findings.